By default the Motorola Moto E install apps in the main internal storage. Same goes for the files that are received using Bluetooth or files that you download using the web browser. To change the defaults paths you will have to use the Xposed module.
Of course to do that you must have a rooted Moto E. Then install the Xposed framework from here. After that you will have to download and install Downloads2SD. This application will redirect your Chrome and Firefox downloads to /sdcard/Downloads.
Your pictures will go to /sdcard/DCIM and your screenshots will go to /sdcard/Pictures while using the Screenshot. Get the Download2SD from here.